Access Barring Check with Dynamic Timer for CE Levels
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Solution Overview
Problem
In wireless communication systems, especially in congested networks with varying environmental conditions, access attempts by user equipment (UE) may fail due to increased repetition, leading to worsened congestion, necessitating a method for performing access barring checks based on coverage enhancement (CE) levels to manage network load effectively.
Innovation Solution
A method and apparatus for a UE to perform access barring checks, where if access to a cell is barred, a barring timer is started, and if the CE level changes, the timer is stopped, allowing for dynamic adjustment of access barring parameters based on CE levels to alleviate congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If access barring parameters are applied to manage network congestion, then network load is reduced, but access availability for UEs deteriorates
Solution Approach 1:
The patent applies different access barring parameters to different coverage enhancement levels (CE levels). Each CE level has its own barring parameters, allowing the network to apply more stringent barring to UEs in severe congestion areas while maintaining access for UEs in less congested areas. This local differentiation resolves the contradiction by managing network load selectively without completely blocking access.
Solution Approach 2:
The patent introduces a barring timer that dynamically adjusts the access barring status. When a UE changes CE level, the timer is stopped and barring status is reset. This dynamic adjustment allows the system to adapt access availability based on real-time network conditions and UE mobility, balancing network load management with access reliability.
2Reliability
If repetition is increased to improve transmission reliability, then transmission success rate improves, but network congestion worsens
Solution Approach 1:
The patent uses CE level information as feedback to dynamically adjust access barring parameters. The network monitors CE level changes and uses this feedback to modify barring status, allowing UEs to attempt access when conditions improve while preventing excessive repetition during congestion. This feedback mechanism resolves the contradiction by adapting transmission attempts to actual network conditions.
Solution Approach 2:
The patent changes access barring parameters based on CE level. When CE level changes, the system modifies barring parameters (starting or stopping the barring timer), which dynamically adjusts the balance between transmission reliability and network congestion management. This parameter change allows the system to optimize transmission success without causing excessive congestion.
3Quantity of substance
If access barring is applied to all UEs uniformly, then network congestion is managed, but fairness among different CE levels deteriorates
Solution Approach 1:
The patent applies different access barring parameters to different CE levels, creating local quality differentiation. Each CE level has its own barring configuration, allowing fair treatment of UEs based on their specific coverage conditions. This resolves the fairness contradiction by ensuring that UEs in severe coverage areas are not unduly penalized compared to UEs in better coverage areas.
Solution Approach 2:
The patent segments the UE population by CE level and applies separate access barring parameters to each segment. This segmentation allows the network to manage congestion at the granular level of individual CE areas, maintaining fairness within each segment while managing overall network load. The barring timer mechanism further segments the time dimension, allowing dynamic adjustment for different UE groups.
Data Source
AI summary
Provided are a method for a user equipment (UE) to perform access barring check in a wireless communication system, and an apparatus supporting the same. The method may include: performing the access barring check for a cell; if access to the cell is barred, starting a barring timer; and if a coverage enhancement (CE) level of the UE is changed in the cell, stopping the started barring timer.